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<title>Code coverage report for lib\crc.js</title>
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<h1>Code coverage report for <span class="entity">lib\crc.js</span></h1>
<h2>
Statements: <span class="metric">100% <small>(21 / 21)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
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<div class="path"><a href="../index.html">All files</a> &#187; <a href="index.html">lib/</a> &#187; crc.js</div>
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<pre><table class="coverage">
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">// Copyright (c) 2012 Kuba Niegowski
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
&nbsp;
'use strict';
&nbsp;
var CrcCalculator = module.exports = function() {
this._crc = -1;
};
&nbsp;
CrcCalculator.prototype.write = function(data) {
&nbsp;
for (var i = 0; i &lt; data.length; i++) {
this._crc = crcTable[(this._crc ^ data[i]) &amp; 0xff] ^ (this._crc &gt;&gt;&gt; 8);
}
return true;
};
&nbsp;
CrcCalculator.prototype.crc32 = function() {
return this._crc ^ -1;
};
&nbsp;
&nbsp;
CrcCalculator.crc32 = function(buf) {
&nbsp;
var crc = -1;
for (var i = 0; i &lt; buf.length; i++) {
crc = crcTable[(crc ^ buf[i]) &amp; 0xff] ^ (crc &gt;&gt;&gt; 8);
}
return crc ^ -1;
};
&nbsp;
&nbsp;
&nbsp;
var crcTable = [];
&nbsp;
for (var i = 0; i &lt; 256; i++) {
var c = i;
for (var j = 0; j &lt; 8; j++) {
if (c &amp; 1) {
c = 0xedb88320 ^ (c &gt;&gt;&gt; 1);
} else {
c = c &gt;&gt;&gt; 1;
}
}
crcTable[i] = c;
}
&nbsp;</pre></td></tr>
</table></pre>
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